2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6 * Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
7 * Linux for s390 port by D.J. Barrow
8 * <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 # ifndef PTRACE_PEEKUSR
41 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
43 # ifndef PTRACE_POKEUSR
44 # define PTRACE_POKEUSR PTRACE_POKEUSER
46 #elif defined(HAVE_LINUX_PTRACE_H)
47 # undef PTRACE_SYSCALL
48 # ifdef HAVE_STRUCT_IA64_FPREG
49 # define ia64_fpreg XXX_ia64_fpreg
51 # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
52 # define pt_all_user_regs XXX_pt_all_user_regs
54 # include <linux/ptrace.h>
56 # undef pt_all_user_regs
60 # include <asm/ptrace_offsets.h>
63 #if defined(SPARC) || defined(SPARC64) || defined(MIPS)
65 struct pt_regs si_regs;
68 #elif defined HAVE_ASM_SIGCONTEXT_H
69 # if !defined(IA64) && !defined(X86_64) && !defined(X32)
70 # include <asm/sigcontext.h>
72 #else /* !HAVE_ASM_SIGCONTEXT_H */
73 # if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT
75 unsigned long sc_mask;
83 unsigned short sc_formatvec;
86 #endif /* !HAVE_ASM_SIGCONTEXT_H */
89 # warning: NSIG is not defined, using 32
93 /* Ugh. Is this really correct? ARM has no RT signals?! */
100 #if defined I386 || defined X86_64 || defined X32
101 /* The libc headers do not define this constant since it should only be
102 used by the implementation. So we define it here. */
104 # define SA_RESTORER 0x04000000
108 static const struct xlat sigact_flags[] = {
110 { SA_RESTORER, "SA_RESTORER" },
113 { SA_STACK, "SA_STACK" },
116 { SA_RESTART, "SA_RESTART" },
119 { SA_INTERRUPT, "SA_INTERRUPT" },
122 { SA_NODEFER, "SA_NODEFER" },
124 #if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
125 { SA_NOMASK, "SA_NOMASK" },
128 { SA_RESETHAND, "SA_RESETHAND" },
130 #if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
131 { SA_ONESHOT, "SA_ONESHOT" },
134 { SA_SIGINFO, "SA_SIGINFO" },
137 { SA_RESETHAND, "SA_RESETHAND" },
140 { SA_ONSTACK, "SA_ONSTACK" },
143 { SA_NODEFER, "SA_NODEFER" },
146 { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
149 { SA_NOCLDWAIT, "SA_NOCLDWAIT" },
152 { _SA_BSDCALL, "_SA_BSDCALL" },
155 { SA_NOPTRACE, "SA_NOPTRACE" },
160 static const struct xlat sigprocmaskcmds[] = {
161 { SIG_BLOCK, "SIG_BLOCK" },
162 { SIG_UNBLOCK, "SIG_UNBLOCK" },
163 { SIG_SETMASK, "SIG_SETMASK" },
165 { SIG_SETMASK32,"SIG_SETMASK32" },
170 #endif /* HAVE_SIGACTION */
172 /* Anonymous realtime signals. */
173 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
174 constant. This is what we want. Otherwise, just use SIGRTMIN. */
177 #define __SIGRTMIN SIGRTMIN
178 #define __SIGRTMAX SIGRTMAX /* likewise */
182 /* Note on the size of sigset_t:
184 * In glibc, sigset_t is an array with space for 1024 bits (!),
185 * even though all arches supported by Linux have only 64 signals
186 * except MIPS, which has 128. IOW, it is 128 bytes long.
188 * In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long).
189 * However, some old syscall return only 32 lower bits (one word).
190 * Example: sys_sigpending vs sys_rt_sigpending.
192 * Be aware of this fact when you try to
193 * memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t))
194 * - sizeof(sigset_t) is much bigger than you think,
195 * it may overflow tcp->u_arg[] array, and it may try to copy more data
196 * than is really available in <something>.
198 * umoven(tcp, addr, sizeof(sigset_t), &sigset)
199 * may be a bad idea: it'll try to read much more data than needed
200 * to fetch a sigset_t.
201 * Use (NSIG / 8) as a size instead.
207 static char buf[sizeof("SIGRT_%d") + sizeof(int)*3];
209 if (sig >= 0 && sig < nsignals)
210 return signalent[sig];
212 if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
213 sprintf(buf, "SIGRT_%d", (int)(sig - __SIGRTMIN));
217 sprintf(buf, "%d", sig);
222 long_to_sigset(long l, sigset_t *s)
229 copy_sigset_len(struct tcb *tcp, long addr, sigset_t *s, int len)
231 if (len > sizeof(*s))
234 if (umoven(tcp, addr, len, (char *)s) < 0)
239 /* Original sigset is unsigned long */
240 #define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(long))
243 sprintsigmask(const char *str, sigset_t *mask, int rt)
244 /* set might include realtime sigs */
246 /* Was [8 * sizeof(sigset_t) * 8], but
247 * glibc sigset_t is huge (1024 bits = 128 *bytes*),
248 * and we were ending up with 8k (!) buffer here.
250 * No Unix system can have sig > 255
251 * (waitpid API won't be able to indicate death from one)
252 * and sig 0 doesn't exist either.
253 * Therefore max possible no of sigs is 255: 1..255
255 static char outstr[8 * (255 * 2 / 3)];
263 /* Note: nsignals = ARRAY_SIZE(signalent[]),
264 * and that array may not have SIGRTnn.
269 maxsigs = __SIGRTMAX + 1; /* instead */
271 s = stpcpy(outstr, str);
273 for (i = 1; i < maxsigs; i++) {
274 if (sigismember(mask, i) == 1)
278 /* 1: show mask members, 0: show those which are NOT in mask */
279 show_members = (nsigs < nsignals * 2 / 3);
284 for (i = 1; i < maxsigs; i++) {
285 if (sigismember(mask, i) == show_members) {
288 s = stpcpy(s, signalent[i] + 3);
291 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
292 s += sprintf(s, "RT_%u", i - __SIGRTMIN);
294 #endif /* SIGRTMIN */
296 s += sprintf(s, "%u", i);
309 printsigmask(sigset_t *mask, int rt)
311 tprints(sprintsigmask("", mask, rt));
317 tprints(signame(nr));
321 print_sigset(struct tcb *tcp, long addr, int rt)
327 else if (copy_sigset(tcp, addr, &ss) < 0)
328 tprintf("%#lx", addr);
330 printsigmask(&ss, rt);
334 #define ILL_ILLOPC 1 /* illegal opcode */
335 #define ILL_ILLOPN 2 /* illegal operand */
336 #define ILL_ILLADR 3 /* illegal addressing mode */
337 #define ILL_ILLTRP 4 /* illegal trap */
338 #define ILL_PRVOPC 5 /* privileged opcode */
339 #define ILL_PRVREG 6 /* privileged register */
340 #define ILL_COPROC 7 /* coprocessor error */
341 #define ILL_BADSTK 8 /* internal stack error */
342 #define FPE_INTDIV 1 /* integer divide by zero */
343 #define FPE_INTOVF 2 /* integer overflow */
344 #define FPE_FLTDIV 3 /* floating point divide by zero */
345 #define FPE_FLTOVF 4 /* floating point overflow */
346 #define FPE_FLTUND 5 /* floating point underflow */
347 #define FPE_FLTRES 6 /* floating point inexact result */
348 #define FPE_FLTINV 7 /* floating point invalid operation */
349 #define FPE_FLTSUB 8 /* subscript out of range */
350 #define SEGV_MAPERR 1 /* address not mapped to object */
351 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
352 #define BUS_ADRALN 1 /* invalid address alignment */
353 #define BUS_ADRERR 2 /* non-existant physical address */
354 #define BUS_OBJERR 3 /* object specific hardware error */
355 #define TRAP_BRKPT 1 /* process breakpoint */
356 #define TRAP_TRACE 2 /* process trace trap */
357 #define CLD_EXITED 1 /* child has exited */
358 #define CLD_KILLED 2 /* child was killed */
359 #define CLD_DUMPED 3 /* child terminated abnormally */
360 #define CLD_TRAPPED 4 /* traced child has trapped */
361 #define CLD_STOPPED 5 /* child has stopped */
362 #define CLD_CONTINUED 6 /* stopped child has continued */
363 #define POLL_IN 1 /* data input available */
364 #define POLL_OUT 2 /* output buffers available */
365 #define POLL_MSG 3 /* input message available */
366 #define POLL_ERR 4 /* i/o error */
367 #define POLL_PRI 5 /* high priority input available */
368 #define POLL_HUP 6 /* device disconnected */
369 #define SI_KERNEL 0x80 /* sent by kernel */
370 #define SI_USER 0 /* sent by kill, sigsend, raise */
371 #define SI_QUEUE -1 /* sent by sigqueue */
372 #define SI_TIMER -2 /* sent by timer expiration */
373 #define SI_MESGQ -3 /* sent by real time mesq state change */
374 #define SI_ASYNCIO -4 /* sent by AIO completion */
375 #define SI_SIGIO -5 /* sent by SIGIO */
376 #define SI_TKILL -6 /* sent by tkill */
377 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
381 # define SI_FROMUSER(sip) ((sip)->si_code <= 0)
384 static const struct xlat siginfo_codes[] = {
386 { SI_KERNEL, "SI_KERNEL" },
389 { SI_USER, "SI_USER" },
392 { SI_QUEUE, "SI_QUEUE" },
395 { SI_TIMER, "SI_TIMER" },
398 { SI_MESGQ, "SI_MESGQ" },
401 { SI_ASYNCIO, "SI_ASYNCIO" },
404 { SI_SIGIO, "SI_SIGIO" },
407 { SI_TKILL, "SI_TKILL" },
410 { SI_ASYNCNL, "SI_ASYNCNL" },
413 { SI_NOINFO, "SI_NOINFO" },
416 { SI_LWP, "SI_LWP" },
421 static const struct xlat sigill_codes[] = {
422 { ILL_ILLOPC, "ILL_ILLOPC" },
423 { ILL_ILLOPN, "ILL_ILLOPN" },
424 { ILL_ILLADR, "ILL_ILLADR" },
425 { ILL_ILLTRP, "ILL_ILLTRP" },
426 { ILL_PRVOPC, "ILL_PRVOPC" },
427 { ILL_PRVREG, "ILL_PRVREG" },
428 { ILL_COPROC, "ILL_COPROC" },
429 { ILL_BADSTK, "ILL_BADSTK" },
433 static const struct xlat sigfpe_codes[] = {
434 { FPE_INTDIV, "FPE_INTDIV" },
435 { FPE_INTOVF, "FPE_INTOVF" },
436 { FPE_FLTDIV, "FPE_FLTDIV" },
437 { FPE_FLTOVF, "FPE_FLTOVF" },
438 { FPE_FLTUND, "FPE_FLTUND" },
439 { FPE_FLTRES, "FPE_FLTRES" },
440 { FPE_FLTINV, "FPE_FLTINV" },
441 { FPE_FLTSUB, "FPE_FLTSUB" },
445 static const struct xlat sigtrap_codes[] = {
446 { TRAP_BRKPT, "TRAP_BRKPT" },
447 { TRAP_TRACE, "TRAP_TRACE" },
451 static const struct xlat sigchld_codes[] = {
452 { CLD_EXITED, "CLD_EXITED" },
453 { CLD_KILLED, "CLD_KILLED" },
454 { CLD_DUMPED, "CLD_DUMPED" },
455 { CLD_TRAPPED, "CLD_TRAPPED" },
456 { CLD_STOPPED, "CLD_STOPPED" },
457 { CLD_CONTINUED,"CLD_CONTINUED" },
461 static const struct xlat sigpoll_codes[] = {
462 { POLL_IN, "POLL_IN" },
463 { POLL_OUT, "POLL_OUT" },
464 { POLL_MSG, "POLL_MSG" },
465 { POLL_ERR, "POLL_ERR" },
466 { POLL_PRI, "POLL_PRI" },
467 { POLL_HUP, "POLL_HUP" },
471 static const struct xlat sigprof_codes[] = {
473 { PROF_SIG, "PROF_SIG" },
479 static const struct xlat sigemt_codes[] = {
481 { EMT_TAGOVF, "EMT_TAGOVF" },
487 static const struct xlat sigsegv_codes[] = {
488 { SEGV_MAPERR, "SEGV_MAPERR" },
489 { SEGV_ACCERR, "SEGV_ACCERR" },
493 static const struct xlat sigbus_codes[] = {
494 { BUS_ADRALN, "BUS_ADRALN" },
495 { BUS_ADRERR, "BUS_ADRERR" },
496 { BUS_OBJERR, "BUS_OBJERR" },
501 printsiginfo(siginfo_t *sip, int verbose)
505 if (sip->si_signo == 0) {
509 tprints("{si_signo=");
510 printsignal(sip->si_signo);
511 code = xlookup(siginfo_codes, sip->si_code);
513 switch (sip->si_signo) {
515 code = xlookup(sigtrap_codes, sip->si_code);
518 code = xlookup(sigchld_codes, sip->si_code);
521 code = xlookup(sigpoll_codes, sip->si_code);
524 code = xlookup(sigprof_codes, sip->si_code);
527 code = xlookup(sigill_codes, sip->si_code);
531 code = xlookup(sigemt_codes, sip->si_code);
535 code = xlookup(sigfpe_codes, sip->si_code);
538 code = xlookup(sigsegv_codes, sip->si_code);
541 code = xlookup(sigbus_codes, sip->si_code);
546 tprintf(", si_code=%s", code);
548 tprintf(", si_code=%#x", sip->si_code);
550 if (sip->si_code != SI_NOINFO)
554 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
555 tprintf(", si_errno=%d", sip->si_errno);
557 tprintf(", si_errno=%s",
558 errnoent[sip->si_errno]);
561 if (SI_FROMUSER(sip)) {
562 tprintf(", si_pid=%lu, si_uid=%lu",
563 (unsigned long) sip->si_pid,
564 (unsigned long) sip->si_uid);
565 switch (sip->si_code) {
576 tprintf(", si_value=%d", sip->si_int);
585 tprintf(", si_value={int=%u, ptr=%#lx}",
587 (unsigned long) sip->si_ptr);
592 #endif /* SI_FROMUSER */
594 switch (sip->si_signo) {
596 tprintf(", si_pid=%ld, si_status=",
598 if (sip->si_code == CLD_EXITED)
599 tprintf("%d", sip->si_status);
601 printsignal(sip->si_status);
605 tprintf(", si_utime=%llu, si_stime=%llu",
606 (unsigned long long) sip->si_utime,
607 (unsigned long long) sip->si_stime);
609 case SIGILL: case SIGFPE:
610 case SIGSEGV: case SIGBUS:
611 tprintf(", si_addr=%#lx",
612 (unsigned long) sip->si_addr);
615 switch (sip->si_code) {
616 case POLL_IN: case POLL_OUT: case POLL_MSG:
617 tprintf(", si_band=%ld",
618 (long) sip->si_band);
623 if (sip->si_pid || sip->si_uid)
624 tprintf(", si_pid=%lu, si_uid=%lu",
625 (unsigned long) sip->si_pid,
626 (unsigned long) sip->si_uid);
632 tprintf(", si_value={int=%u, ptr=%#lx}",
634 (unsigned long) sip->si_ptr);
644 printsiginfo_at(struct tcb *tcp, long addr)
652 tprintf("%#lx", addr);
655 if (umove(tcp, addr, &si) < 0) {
659 printsiginfo(&si, verbose(tcp));
663 sys_sigsetmask(struct tcb *tcp)
667 long_to_sigset(tcp->u_arg[0], &sigm);
668 printsigmask(&sigm, 0);
670 else if (!syserror(tcp)) {
672 long_to_sigset(tcp->u_rval, &sigm);
673 tcp->auxstr = sprintsigmask("old mask ", &sigm, 0);
675 return RVAL_HEX | RVAL_STR;
680 #ifdef HAVE_SIGACTION
682 struct old_sigaction {
683 /* sa_handler may be a libc #define, need to use other name: */
684 void (*__sa_handler)(int);
685 unsigned long sa_mask;
686 unsigned long sa_flags;
687 void (*sa_restorer)(void);
691 sys_sigaction(struct tcb *tcp)
695 struct old_sigaction sa;
698 printsignal(tcp->u_arg[0]);
700 addr = tcp->u_arg[1];
702 addr = tcp->u_arg[2];
705 else if (!verbose(tcp))
706 tprintf("%#lx", addr);
707 else if (umove(tcp, addr, &sa) < 0)
710 /* Architectures using function pointers, like
711 * hppa, may need to manipulate the function pointer
712 * to compute the result of a comparison. However,
713 * the __sa_handler function pointer exists only in
714 * the address space of the traced process, and can't
715 * be manipulated by strace. In order to prevent the
716 * compiler from generating code to manipulate
717 * __sa_handler we cast the function pointers to long. */
718 if ((long)sa.__sa_handler == (long)SIG_ERR)
719 tprints("{SIG_ERR, ");
720 else if ((long)sa.__sa_handler == (long)SIG_DFL)
721 tprints("{SIG_DFL, ");
722 else if ((long)sa.__sa_handler == (long)SIG_IGN)
723 tprints("{SIG_IGN, ");
725 tprintf("{%#lx, ", (long) sa.__sa_handler);
726 long_to_sigset(sa.sa_mask, &sigset);
727 printsigmask(&sigset, 0);
729 printflags(sigact_flags, sa.sa_flags, "SA_???");
731 if (sa.sa_flags & SA_RESTORER)
732 tprintf(", %p", sa.sa_restorer);
739 tprintf(", %#lx", (unsigned long) sa.sa_restorer);
744 sys_signal(struct tcb *tcp)
747 printsignal(tcp->u_arg[0]);
749 switch (tcp->u_arg[1]) {
760 tprintf("%#lx", tcp->u_arg[1]);
764 else if (!syserror(tcp)) {
765 switch (tcp->u_rval) {
767 tcp->auxstr = "SIG_ERR"; break;
769 tcp->auxstr = "SIG_DFL"; break;
771 tcp->auxstr = "SIG_IGN"; break;
775 return RVAL_HEX | RVAL_STR;
780 #endif /* HAVE_SIGACTION */
783 sys_sigreturn(struct tcb *tcp)
787 struct arm_sigcontext {
788 unsigned long trap_no;
789 unsigned long error_code;
790 unsigned long oldmask;
791 unsigned long arm_r0;
792 unsigned long arm_r1;
793 unsigned long arm_r2;
794 unsigned long arm_r3;
795 unsigned long arm_r4;
796 unsigned long arm_r5;
797 unsigned long arm_r6;
798 unsigned long arm_r7;
799 unsigned long arm_r8;
800 unsigned long arm_r9;
801 unsigned long arm_r10;
802 unsigned long arm_fp;
803 unsigned long arm_ip;
804 unsigned long arm_sp;
805 unsigned long arm_lr;
806 unsigned long arm_pc;
807 unsigned long arm_cpsr;
808 unsigned long fault_address;
810 struct arm_ucontext {
811 unsigned long uc_flags;
812 unsigned long uc_link; /* struct ucontext* */
813 /* The next three members comprise stack_t struct: */
814 unsigned long ss_sp; /* void* */
815 unsigned long ss_flags; /* int */
816 unsigned long ss_size; /* size_t */
817 struct arm_sigcontext sc;
818 /* These two members are sigset_t: */
819 unsigned long uc_sigmask[2];
820 /* more fields follow, which we aren't interested in */
822 struct arm_ucontext uc;
824 if (umove(tcp, arm_regs.ARM_sp, &uc) < 0)
826 /* Kernel fills out uc.sc.oldmask too when it sets up signal stack,
827 * but for sigmask restore, sigreturn syscall uses uc.uc_sigmask instead.
828 * long_to_sigset(uc.sc.oldmask, &sigm);
829 * tprints(sprintsigmask(") (mask ", &sigm, 0));
832 ((uint32_t*)&sigm)[0] = uc.uc_sigmask[0];
833 ((uint32_t*)&sigm)[1] = uc.uc_sigmask[1];
834 tprints(sprintsigmask(") (mask ", &sigm, /*rt:*/ 1));
836 #elif defined(S390) || defined(S390X)
839 struct sigcontext_struct sc;
840 if (upeek(tcp->pid, PT_GPR15, &usp) < 0)
842 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
844 tprints(sprintsigmask(") (mask ", (sigset_t *)&sc.oldmask[0], 0));
846 #elif defined(I386) || defined(X86_64)
848 if (current_personality == 0) /* 64-bit */
852 struct i386_sigcontext_struct {
870 uint32_t esp_at_signal;
876 struct i386_fpstate {
884 uint8_t st[8][10]; /* 8*10 bytes: FP regs */
887 uint32_t fxsr_env[6];
890 uint8_t stx[8][16]; /* 8*16 bytes: FP regs, each padded to 16 bytes */
891 uint8_t xmm[8][16]; /* 8 XMM regs */
892 uint32_t padding1[44];
893 uint32_t padding2[12]; /* union with struct _fpx_sw_bytes */
896 struct i386_sigcontext_struct sc;
897 struct i386_fpstate fp;
898 uint32_t extramask[1];
900 /* On i386, sc is followed on stack by struct fpstate
901 * and after it an additional u32 extramask[1] which holds
902 * upper half of the mask.
905 if (umove(tcp, *i386_esp_ptr, &signal_stack) < 0)
908 ((uint32_t*)&sigm)[0] = signal_stack.sc.oldmask;
909 ((uint32_t*)&sigm)[1] = signal_stack.extramask[0];
910 tprints(sprintsigmask(") (mask ", &sigm, /*RT sigs too?:*/ 1));
914 struct sigcontext sc;
917 /* offset of sigcontext in the kernel's sigframe structure: */
918 # define SIGFRAME_SC_OFFSET 0x90
919 if (upeek(tcp->pid, PT_R12, &sp) < 0)
921 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
924 memcpy(&sigm, &sc.sc_mask, NSIG / 8);
925 tprints(sprintsigmask(") (mask ", &sigm, 0));
927 #elif defined(POWERPC)
930 struct sigcontext_struct sc;
933 esp = ppc_regs.gpr[1];
935 /* Skip dummy stack frame. */
937 if (current_personality == 0)
944 if (umove(tcp, esp, &sc) < 0)
946 long_to_sigset(sc.oldmask, &sigm);
947 tprints(sprintsigmask(") (mask ", &sigm, 0));
952 struct sigcontext sc;
954 if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
956 if (umove(tcp, usp, &sc) < 0)
958 long_to_sigset(sc.sc_mask, &sigm);
959 tprints(sprintsigmask(") (mask ", &sigm, 0));
964 struct sigcontext_struct sc;
966 if (upeek(tcp->pid, REG_FP, &fp) < 0)
968 if (umove(tcp, fp, &sc) < 0)
970 long_to_sigset(sc.sc_mask, &sigm);
971 tprints(sprintsigmask(") (mask ", &sigm, 0));
973 #elif defined(SPARC) || defined(SPARC64)
978 i1 = sparc_regs.u_regs[U_REG_O1];
979 if (umove(tcp, i1, &si) < 0) {
980 perror_msg("sigreturn: umove");
983 long_to_sigset(si.si_mask, &sigm);
984 tprints(sprintsigmask(") (mask ", &sigm, 0));
986 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
987 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
993 if (upeek(tcp->pid, REG_SP, &sp) < 0)
995 /* There are six words followed by a 128-byte siginfo. */
996 sp = sp + 6 * 4 + 128;
997 if (umove(tcp, sp, &uc) < 0)
999 long_to_sigset(*(long *) &uc.uc_sigmask, &sigm);
1000 tprints(sprintsigmask(") (mask ", &sigm, 0));
1003 if (entering(tcp)) {
1005 struct pt_regs regs;
1008 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1009 perror_msg("sigreturn: PTRACE_GETREGS");
1013 if (umove(tcp, sp, &si) < 0)
1015 long_to_sigset(si.si_mask, &sigm);
1016 tprints(sprintsigmask(") (mask ", &sigm, 0));
1018 #elif defined(CRISV10) || defined(CRISV32)
1019 if (entering(tcp)) {
1020 struct sigcontext sc;
1021 long regs[PT_MAX+1];
1023 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
1024 perror_msg("sigreturn: PTRACE_GETREGS");
1027 if (umove(tcp, regs[PT_USP], &sc) < 0)
1029 long_to_sigset(sc.oldmask, &sigm);
1030 tprints(sprintsigmask(") (mask ", &sigm, 0));
1033 if (entering(tcp)) {
1037 /* offset of ucontext in the kernel's sigframe structure */
1038 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(siginfo_t)
1039 if (umove(tcp, tile_regs.sp + SIGFRAME_UC_OFFSET, &uc) < 0)
1042 memcpy(&sigm, &uc.uc_sigmask, NSIG / 8);
1043 tprints(sprintsigmask(") (mask ", &sigm, 0));
1045 #elif defined(MICROBLAZE)
1046 /* TODO: Verify that this is correct... */
1047 if (entering(tcp)) {
1048 struct sigcontext sc;
1051 /* Read r1, the stack pointer. */
1052 if (upeek(tcp->pid, 1 * 4, &sp) < 0)
1054 if (umove(tcp, sp, &sc) < 0)
1056 long_to_sigset(sc.oldmask, &sigm);
1057 tprints(sprintsigmask(") (mask ", &sigm, 0));
1059 #elif defined(XTENSA)
1060 /* Xtensa only has rt_sys_sigreturn */
1062 # warning No sys_sigreturn() for this architecture
1063 # warning (no problem, just a reminder :-)
1069 sys_siggetmask(struct tcb *tcp)
1073 long_to_sigset(tcp->u_rval, &sigm);
1074 tcp->auxstr = sprintsigmask("mask ", &sigm, 0);
1076 return RVAL_HEX | RVAL_STR;
1080 sys_sigsuspend(struct tcb *tcp)
1082 if (entering(tcp)) {
1084 long_to_sigset(tcp->u_arg[2], &sigm);
1085 printsigmask(&sigm, 0);
1090 #if !defined SS_ONSTACK
1091 #define SS_ONSTACK 1
1092 #define SS_DISABLE 2
1095 static const struct xlat sigaltstack_flags[] = {
1096 { SS_ONSTACK, "SS_ONSTACK" },
1097 { SS_DISABLE, "SS_DISABLE" },
1102 print_stack_t(struct tcb *tcp, unsigned long addr)
1108 } else if (umove(tcp, addr, &ss) < 0) {
1109 tprintf("%#lx", addr);
1111 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1112 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1113 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1118 sys_sigaltstack(struct tcb *tcp)
1120 if (entering(tcp)) {
1121 print_stack_t(tcp, tcp->u_arg[0]);
1125 print_stack_t(tcp, tcp->u_arg[1]);
1130 #ifdef HAVE_SIGACTION
1133 sys_sigprocmask(struct tcb *tcp)
1137 if (entering(tcp)) {
1139 * Alpha/OSF is different: it doesn't pass in two pointers,
1140 * but rather passes in the new bitmask as an argument and
1141 * then returns the old bitmask. This "works" because we
1142 * only have 64 signals to worry about. If you want more,
1143 * use of the rt_sigprocmask syscall is required.
1145 * old = osf_sigprocmask(how, new);
1147 * ret = sigprocmask(how, &new, &old, ...);
1149 memcpy(&ss, &tcp->u_arg[1], sizeof(long));
1150 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1152 printsigmask(&ss, 0);
1154 else if (!syserror(tcp)) {
1155 memcpy(&ss, &tcp->u_rval, sizeof(long));
1156 tcp->auxstr = sprintsigmask("old mask ", &ss, 0);
1157 return RVAL_HEX | RVAL_STR;
1160 if (entering(tcp)) {
1161 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1163 print_sigset(tcp, tcp->u_arg[1], 0);
1169 else if (syserror(tcp))
1170 tprintf("%#lx", tcp->u_arg[2]);
1172 print_sigset(tcp, tcp->u_arg[2], 0);
1178 #endif /* HAVE_SIGACTION */
1181 sys_kill(struct tcb *tcp)
1183 if (entering(tcp)) {
1185 widen_to_long(tcp->u_arg[0]),
1186 signame(tcp->u_arg[1])
1193 sys_tgkill(struct tcb *tcp)
1195 if (entering(tcp)) {
1196 tprintf("%ld, %ld, %s",
1197 widen_to_long(tcp->u_arg[0]),
1198 widen_to_long(tcp->u_arg[1]),
1199 signame(tcp->u_arg[2])
1206 sys_sigpending(struct tcb *tcp)
1212 tprintf("%#lx", tcp->u_arg[0]);
1213 else if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1216 printsigmask(&sigset, 0);
1222 sys_rt_sigprocmask(struct tcb *tcp)
1226 /* Note: arg[3] is the length of the sigset. */
1227 if (entering(tcp)) {
1228 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1232 else if (copy_sigset_len(tcp, tcp->u_arg[1], &sigset, tcp->u_arg[3]) < 0)
1233 tprintf("%#lx, ", tcp->u_arg[1]);
1235 printsigmask(&sigset, 1);
1242 else if (syserror(tcp))
1243 tprintf("%#lx", tcp->u_arg[2]);
1244 else if (copy_sigset_len(tcp, tcp->u_arg[2], &sigset, tcp->u_arg[3]) < 0)
1247 printsigmask(&sigset, 1);
1248 tprintf(", %lu", tcp->u_arg[3]);
1253 /* Structure describing the action to be taken when a signal arrives. */
1254 struct new_sigaction
1256 /* sa_handler may be a libc #define, need to use other name: */
1257 void (*__sa_handler)(int);
1258 unsigned long sa_flags;
1259 void (*sa_restorer)(void);
1260 /* Kernel treats sa_mask as an array of longs. */
1261 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1263 /* Same for i386-on-x86_64 and similar cases */
1264 struct new_sigaction32
1266 uint32_t __sa_handler;
1268 uint32_t sa_restorer;
1269 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1273 sys_rt_sigaction(struct tcb *tcp)
1275 struct new_sigaction sa;
1280 if (entering(tcp)) {
1281 printsignal(tcp->u_arg[0]);
1283 addr = tcp->u_arg[1];
1285 addr = tcp->u_arg[2];
1291 if (!verbose(tcp)) {
1292 tprintf("%#lx", addr);
1295 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1296 if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
1297 struct new_sigaction32 sa32;
1298 r = umove(tcp, addr, &sa32);
1300 memset(&sa, 0, sizeof(sa));
1301 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1302 sa.sa_flags = sa32.sa_flags;
1303 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1304 /* Kernel treats sa_mask as an array of longs.
1305 * For 32-bit process, "long" is uint32_t, thus, for example,
1306 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1307 * But for (64-bit) kernel, 32th bit in sa_mask is
1308 * 32th bit in 0th (64-bit) long!
1309 * For little-endian, it's the same.
1310 * For big-endian, we swap 32-bit words.
1312 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1317 r = umove(tcp, addr, &sa);
1323 /* Architectures using function pointers, like
1324 * hppa, may need to manipulate the function pointer
1325 * to compute the result of a comparison. However,
1326 * the __sa_handler function pointer exists only in
1327 * the address space of the traced process, and can't
1328 * be manipulated by strace. In order to prevent the
1329 * compiler from generating code to manipulate
1330 * __sa_handler we cast the function pointers to long. */
1331 if ((long)sa.__sa_handler == (long)SIG_ERR)
1332 tprints("{SIG_ERR, ");
1333 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1334 tprints("{SIG_DFL, ");
1335 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1336 tprints("{SIG_IGN, ");
1338 tprintf("{%#lx, ", (long) sa.__sa_handler);
1339 /* Questionable code below.
1340 * Kernel won't handle sys_rt_sigaction
1341 * with wrong sigset size (just returns EINVAL)
1342 * therefore tcp->u_arg[3(4)] _must_ be NSIG / 8 here,
1343 * and we always use smaller memcpy. */
1344 sigemptyset(&sigset);
1345 #if defined(SPARC) || defined(SPARC64)
1346 if (tcp->u_arg[4] <= sizeof(sigset))
1347 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[4]);
1349 if (tcp->u_arg[3] <= sizeof(sigset))
1350 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[3]);
1353 memcpy(&sigset, &sa.sa_mask, sizeof(sigset));
1354 printsigmask(&sigset, 1);
1356 printflags(sigact_flags, sa.sa_flags, "SA_???");
1358 if (sa.sa_flags & SA_RESTORER)
1359 tprintf(", %p", sa.sa_restorer);
1367 #if defined(SPARC) || defined(SPARC64)
1368 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1369 #elif defined(ALPHA)
1370 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1372 tprintf(", %lu", tcp->u_arg[3]);
1378 sys_rt_sigpending(struct tcb *tcp)
1384 tprintf("%#lx", tcp->u_arg[0]);
1385 else if (copy_sigset_len(tcp, tcp->u_arg[0],
1386 &sigset, tcp->u_arg[1]) < 0)
1389 printsigmask(&sigset, 1);
1395 sys_rt_sigsuspend(struct tcb *tcp)
1397 if (entering(tcp)) {
1399 if (copy_sigset_len(tcp, tcp->u_arg[0], &sigm, tcp->u_arg[1]) < 0)
1402 printsigmask(&sigm, 1);
1408 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1412 printsiginfo_at(tcp, uinfo);
1416 sys_rt_sigqueueinfo(struct tcb *tcp)
1418 if (entering(tcp)) {
1419 tprintf("%lu, ", tcp->u_arg[0]);
1420 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1426 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1428 if (entering(tcp)) {
1429 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1430 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1435 int sys_rt_sigtimedwait(struct tcb *tcp)
1437 if (entering(tcp)) {
1440 if (copy_sigset_len(tcp, tcp->u_arg[0],
1441 &sigset, tcp->u_arg[3]) < 0)
1444 printsigmask(&sigset, 1);
1446 /* This is the only "return" parameter, */
1447 if (tcp->u_arg[1] != 0)
1449 /* ... if it's NULL, can decode all on entry */
1452 else if (tcp->u_arg[1] != 0) {
1453 /* syscall exit, and u_arg[1] wasn't NULL */
1454 printsiginfo_at(tcp, tcp->u_arg[1]);
1458 /* syscall exit, and u_arg[1] was NULL */
1461 print_timespec(tcp, tcp->u_arg[2]);
1462 tprintf(", %d", (int) tcp->u_arg[3]);
1467 sys_restart_syscall(struct tcb *tcp)
1470 tprints("<... resuming interrupted call ...>");
1475 do_signalfd(struct tcb *tcp, int flags_arg)
1477 if (entering(tcp)) {
1478 printfd(tcp, tcp->u_arg[0]);
1480 print_sigset(tcp, tcp->u_arg[1], 1);
1481 tprintf(", %lu", tcp->u_arg[2]);
1482 if (flags_arg >= 0) {
1484 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1491 sys_signalfd(struct tcb *tcp)
1493 return do_signalfd(tcp, -1);
1497 sys_signalfd4(struct tcb *tcp)
1499 return do_signalfd(tcp, 3);